Avtor/Urednik     Pavlica, Z; Erjavec, V; Petelin, M
Naslov     Odpravljanje patoloških sprememb na četrtem zgornjem ličniku pri psu
Prevedeni naslov     Treatment of the injuried upper fourth premolar in the dog
Tip     članek
Vir     Slov Vet Res
Vol. in št.     Letnik 38, št. 1
Leto izdaje     2001
Obseg     str. 83-95
Jezik     eng
Abstrakt     The upper fourth premolars are very important teeth in the equilibrated crossways bite action of the teeth and food taking. Therefore an attempt should be made fo preserve them. A frequent injury to the crown is fractured crown with pulp exposure, the consequence of which is an acute or chronic inflammation of the pulp that can progress to the chronic inflammation of the periapical tissue. In majority of cases radiographs demonstrated peri and parapical widened periodontal ligament space, which proceed in the region of apex into a distinct, rounded, radiolucent area or proceeded into the surrounding bone without clear visible borders. Therefore 39 teeth, that also had severely damaged crown, were extracted. In 30 dogs root canals of the upper fourth premolars were endodontically treatet with the crown down technique in one single meeting. After thorough cleaning and sterilising of the rooth canal the hermetic three dimensional filling with heated alpha phase guttapercha followed. Characteristics of heated alpha phase guttapercha with plastic carrier allowed hermetic obturation of the main canal as well as apical delta foraminas in a single insertion without additional lateral and vertical condensation and without placing of new rigid guttaperchas. When heated, alpha phase guttapercha become exceedingly sticky and tacky and adhered perfectly to the cleaned, conically shaped and desinfected root canal. As endodontically treated teeth become more brittle and therefore more susceptible to further deterioration we decided in six cases to replace the crown with a metal crown, which was cemented with resin adhesive cement Panavia 21 Dental Adhesive. One of its outstanding characteristics is that of bonding to the dentin and the rest of the enamel and high tensile and compressive strength. The resin cement Panavia 21 Dental Adhesive is among all cements the most effective one among the best cements capable of undertaking the equilibrated crossways bite action in the dog.
Izvleček     Pri uravnoteženem delovanju navzkrižnih griznih sil celotnega zobovja in jemanju hrane sta četrta zgornja ličnika zelo pomembna. Zato ju poskušamo ohraniti. Na njunih kronah nastanejo največkrat poškodbe, ko se odlomi večji del krone in se izpostavi zobna pulpa. Posledice so akutna in kronična vnetja zobne pulpe, iz katerih se lahko razvije kronična okužba periapikalnega področja. Pri psu navadno opazimo oteklino lica, močno izraženo bolečino ob odpiranju gobca ter fluktuirajoči parulis na prizadetem zobu. Na rentgenskem posnetku smo v večini primerov opazili peri in paraapikalno razširjeno pozobnično režo. Ta je v predelu apeksa prehajala v ovalno okvaro ali pa brez ostre meje v okolno kost. Zato smo v 39 primerih, kjer so bile hudo poškodovane tudi krone, četrte zgornje ličnike izdrli. Koreninske kanale zgornjih četrtih ličnikov smo pri 30 psih endodontsko zdravili s strojno stopenjsko tehniko navzdol v eni seji. Temeljitemu čiščenju in razkuževanju koreninskih kanalov je sledilo hermetično trodimenzionalno polnjenje z ogreto gutaperčo alfa faze. Lastnosti ogretih zatičkov s plastičnim nosilcem so nam dovoljevale polnjenje glavnega kanala kot tudi apikalne delte v eni potezi, brez dodatne lateralne in vertikalne kondenzacije in vnašanja novih rigidnih gutaperčnih zatičkov. Z ogrevanjem postane gutaperča alfa faze vlečljiva in lepljiva in se očiščenemu, stožčasto oblikovanemu in dezinficiranemu kanalu odlično prilagodi. Ker je endodontsko obdelan zob bolj izsušen in zato bolj dovzeten za ponovno poškodbo, smo se v šestih primerih odločili, da anatomsko krono zoba nadomestimo s kovinsko prevleko, ki smo jo cementirali z adhezivnim cementom Panavia 21 Dental Adhesive.Ta je s svojimi odličnimi lastnostmi vezanja na dentin in preostanek sklenine med vsemi cementi najbolj sposoben prenesti delovanje navzkrižnih griznih sil pri psu, ne da bi pri tem kovinska prevleka odstopila od anatomske krone.
Deskriptorji     TOOTH FRACTURES
TOOTH CROWN
BICUSPID
DOGS
PERIAPICAL GRANULOMA
CROWNS
GUTTA-PERCHA